Arwita, Widya, Abraham Pranata Sitinjak, Naziha Amanda, Rayuni Istiara, Delsa Mahmudah, Sheila Desiska Nasution, and Sri Tama Rotua Sianturi. “Planning a Problem Based Learning (PBL) Model in Biology Subjects in High School: A Case Study”. ETDC: Indonesian Journal of Research and Educational Review 5, no. 1 (December 5, 2025): 196–212. Accessed December 7, 2025. https://etdci.org/journal/ijrer/article/view/4119.